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  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
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  <script>
    // let message = "hello"; // 定义变量并赋值
    // let age = 25;
    // let user = "jack";
    let message = "Hello",
      age = 25,
      user = "jack";
    console.log(message, age, user);
  </script>
</body>

</html>